Detonating-fuse.



f so'KoLorF; or' nnenrmnn PARK, NW .nauasnry Assrcnoa To 1 T, A. emnsrrnzcomrm, A conronATIoN 0F DELAWAEE. f

i l Y l nEToNATmo-rusn.

"To allwhomz'tmey concern: .i l

. Beit known that 'L Bours N'Ixomnvi'rca SOKOLOFE, a subject ofthe Czar of Russia, residing at Ridgefield Park, vin the county of. Bergen' and State yof New e'rsey, have in'- :vented certain newv and useful vImprovements in Detonating-Fusesof which the followingV isl a specification, :reference being hadto the draw-ingv accompanying andforming part of the"same. Y, 'Myinventi'on'relates to detonating fuses in which the percussion rod or striker ,is held in positionlbya flat clip restingonrla sleeve, until Vthe clip isiiattenedby an iinpact which throws the sleeve past the clip "and until'a, second impact in the opposite v"direction thiow's the percussion rod-forward.-

An'explosive capis attached to the percus sion -rod so, that when the'latt'er is thrown forward by the 'second impact a statlonary needle which is inside `of the axial bore of. `the percussion rod is struck by the cap and 'explodes the latter. The explosion of the v overhangmg upper edge of the sleeve hito ap causes explosion of the detonator inside y2li thebody ofthe fuse. The objects of my vinvention are to provide a needle or ring pin which is separate' from the percussion-- mechanism. (described hereinafter) so that the needle or firing pin need not .be placed 80 in position until the shell. is tobegused.

Vthereby making the fuse' safer; to provide a guidefor the firing pi'n, thereby restricting"r lateral movement of the needle'and prevent- A 2 ing breakage ofthe needle due to such lateral movement; t`o eliminate thil vnecessity o-attaching the lneedle-head to 'thecollar ofthe percussion rod; and toeliminate the 'necessity of cutting` a longitudinal slot in the percussion rod. Y- i .y 40 i In'the accompanying drawing,V I

'Figure 1 lista" longitudinal section of a complete detonatingfuse embodying my in-` vention. f*

' Fig. 2 is aflngitudinal section of the per- Y Acussionrod.

. Fig. 3 a side viewV of the percussion rod collar.

' F igel is aside vlew 'of the needle or firing The body of the fuse isdesignated by' a,

andis'of elongated tubularform,' threaded atthe top. or outer end, for securing it in 'the'.end of the shell, not shown. The det-A onator .71, inside the body a, is in the form Q5 of a cylindricalichamber of annular cross `.cussion rod; the safety clip fitted on the Y specmeauon of Letterslratenz. Patented Apr, 3, 1917 I 'applicefin 111e1- septen11ur 18,1916. lseriarive.129,771-, f

section; thus-providing a longitudinal bore 'or passage through' it. The plugsV aand-d are screwed 'into the bottom of the body a Ito close the latter andhold thedetonator b l' having an axial bore or passager` through it; a collar m, slipped"into the-percussion rod up tothe'shoulder l and having a. circumferential groove t; a sleeve k, suitably secured'to the collar m, as by crimpingthe end of the sleeve into the said groove, the Asleeve inolosing the upper end of' the per;

.70 upper end of the percussion rod; a sleeve y lyingl between'the clip Z and the overhanging upper edge of the outer sleeve k, thus serving. to normally prevent outward movement of the percussion rod and itself' pre` 75 ventedI from inward movement by the clip4 Acfand a spring `f bearing on the ,upper or outerw end of the percussion rod anti on the resist upward, or outward, movement of the rod, but permitting such movement at'the proper time, as explained below. On the` lower, or inner,` end .of the tubular percussion rod vis an explosive cap 0,'secured in placeby crimping and by a ring p.

The percussion mechanism described is insertedinto the body a fronrabove, (the screw-plugor nosepiece' e being of course f removed), so that the cap o lies below the Q detonator. The firing pin s is now slipped. into the/ bore of the percussion rod, itshead resting on top` of the percussion mechanism and its' pointed lower end positioned well Y -within the detonator b. The nosepiece e 1s then 'replaced,` and the fuse is then com- 95.l

plete,r ready Afor action.

I loaded. is discharged, the inertia of sleeve g causes it to lag behind the rest of the fuse. ln eilechlthis amounts to driving the sleeve backward. The clip 7: is flattened and the lower end of the sleeve g is brought below theclip, thereby leaving the percussion rod Z free' to move forward, except for the resistance oiered by the helical spring f. When the shell strikes the ground or other object the momentum ofthe percussion rod Z throws the same forward against the tension of the springf. thereby bringing the explosive cap o against the pointed inner end 110 of thefiring pin s. The cap; is thus exploded, thereb)y exploding the detonator which in turn explodes the charge in the shell, not shown. It will be observed that the cap o strikes the end of the tiring pin at a point inside the detonator, thereby ca`using instant and certain explosion of the lat` ter. i

If desired, the firing pin s can be omitted, thus making the shell entirel)Y safe during handling and shipment. Then the pin can be placed in position after, or just before, the shell is sent to the tiring line.

What I claim is: 1. In an impact fuse for explosive shells.

.in combination, a chamber containing a.

detonating charg a longitudinally mov able tubular percussion rod, having imperforate walls and having its body portion ex'- tending through the detonating chamber, an explosive cap attached to one end of the per; cussion rod and normally positioned outside 0f the detonating chamber, and a firing pin, removably attached to the striking endet' the fuse and extending into the bore of said percussion rod, the inner or rearward end of the firing pin being inside the detonating chamber.

In an impact fuse for explosive shells,

in combination, a detonating chamber containing-a detonating charge, a longitudinally movable tubular percussion rod extending rearwardly through the chamber and having imperforate walls, means serving to normall)v hold the percussion rod against forward movement. but releasable by the impact.

of starting the shell in the gun from which itis fired to permit such movement under the influence of the striking impact of the shell, an explosive cap carried on the inner or rearward end of the percussion .rod in rear of the detonating chamber, and a firing pin removably connected tothe forward end of the fuse, extending rearwardly into the tubular percussion rod and terminating inside the 'detouating chamber.-

Y BORIS NIKOLAEVITCH SOKOLOFF. lVitnesses H. M. Essrnrr, b'. NrzLsoN. 

